Bicycle-motor.



No. 695,562. Patented Mar. la, |902.-

n. m. KEATHING. BICYCLE MOTOR.

(Application filed Dec. 8, 1900.\

No Model.) 4 Sheets-$heei l.

"0.695,562. Patented Mar. la, |902.

n. M. KEATING..

BICYCLE MOTUR.

(Application led Dec. 8, 1900.)

4 sheets-sheet 2.

(M Model.)

AHORA/Ey Noms crans co, momuro. wAsmusou u r z 0 m, r. a M d e t n e t a DI a N T A E K M n.

BICYCLE MOTOR. (Appucaeilm mad pac. s, woo.)

4 Sheets-Sheet 3.

(No Model.)

////// j' ll/ WWW-mea Patented Mar. I8, |902. n. M. KEATING. BICYCLE MOTOR.

` (Applicatioh mea nec. s, 1900.)

4 Sheets-Sheet 4.

(NoModel.)

(NVE/Wop l A TTOHNEY UNITED STATES ROBERT M. KEATING, OF MIDDLETOWN, CONNECTICUT, ASSIGNOR TO THE Y R. M. KEATING MOTOR COMPANY,

TION OF MAINE.

.OF PORTLAND, MAINE, A4 CORPORA-y BICYCLE-MOTOR.

SPECIFICATION forming' part of Letters Eat-ent No. 695,562, dated Maren 18, 1902.

Application ledDecmber 8, 1900. 'Serial No. 39,174. (No model.)

To all zzz/wm, t may concern,.-

Be it known that I, ROBERT M. lnnrrllvc,` residing at Middletown, in the county of Middlesex and State of Connecticut, lhave invented certain new and useful Improvements Ain Bicycle-Motors, 'of which the following' is a specification, reference being had therein to: the accompanying drawings.

This invention` relates to engines for motorbicycles, and especially gasolene-engines for bicycles.

The object of the invention is to produce a bicycle or vehicle motor constructed with. special View to lightness and conipactness in a diamond.- frame bicycle; also,to arrange the separate parts of the enginewith special, relation to their location in the frame of a bicycle or vehicle and to improve the` engine as to compactness and accessibility in the frame of a vehicle; also, to provide for the utilization of the waste' heat ofthe engine as far as may be in the vaporization of the gasolene by which the engine is driven and in va`- rious Ways improve the engine for this par-- ticular purpose. x

Figure l is a broken side elevation of a bicycle With my improved motor and connections attached. Fig. 2 is a plan of'the engine-bracket. Fig. 2 is a perspective view of the engine detached and with the cover removed from the casing and gearing, showing some connections in part. Fig. 3 is acentral longitudinal section of the enginecylinder,

piston, gears, and casing. Fig. 4. is a broken detail section of expansion chamber' and Valves. Fig. 5 is a broken detail section of cam and attachments for lifting exhaust-` Valve. Fig. 6 is a top plan view of the motorcylinder and explosion-chamber. Fig. 7 is an enlarged sectional detail of explosion-chamber. Fig. 8 is a detail elevation of cylindercover and explosion-chamber, and Fig. 9 a

cross-section of the muffler.

As the engine` is constructed with special relation to its location in the frame of a bicycle, I have shown such parts of the bicycle as are necessary to give the coi-rect idea of the engine construction.

Let a indicate the front or steering head of a bicycle-frame. The top bar Z7 and the front bar c are connected to the steering-head in any usual way. The seat-post d connects with thetop bar b and with the'pedahbearing gin usual manner, except that the hanger for the 'pedals is connected to the' motor-casing and adapts it -to coperate with the motor, as willy be explained. The rear top Darse connect the upper end of the seat-post with the rear hub-bearingh, while thelower bars f connect the hub-bearing to the casing 7c ofv the motor, this casing being in turn connected to the hanger g. Thus a frame which is substantially'in form like the well-known diamond Vframe is produced.

' A tube or casing Z is connected `to bar c of the frame, andthis case Z has a branch m, which lies in contact Withfupright bar d. The tube or casing l m is divided longitudinally, so that the upper part may be removed Without disturbing the electrical batteries in the interior of said casing. The batteries in this tube are connected to the sparkingdevice of the engine.

By reason of rapid expansion of the gaso- `l'ene in the Ytank of some engines of this character or for some other reason the gasolene to the engine through a passage in the tank,'

and the explosive mixture is made from gasolene-vapor and heated air,as will be explained.

The gasolene-tank 1 is located directly over the engine 2O and both are attached to the seat-post d. The tank l is under the seat and receives the heat of the engine on its lower surface 2.

A valve-chamber2l receives the-vapor from the gasolene-ta'nk'and conducts it to the explosion-chamber 23 of the engine. A checkvalve 22 of usual construction prevents backiiow of gas or iiame from the explosion-chamber to the mixer. This valve is opened by the suction of the piston in the cylinder and held closed when there is no suction by pressure Within the cylinder, the usual spring aiding the closure.

The engine is what is known as a fourcycle engine-that is, the downstroke of the piston 24. in cylinder 25 draws or sucks vapor from l[he valve-chamber 21 inte the explosion- IOO ' chamber and cylinder.

operation in usual manner, and the exhaustvalve 26 opens tolet the spent gases of explosion escape by passage 27 to the muffler.

The sparker 30 is connected to the sparkcoil and batteries by wires and operated to give a spark when the explosion should take place, and the time of the explosion can be determined by the position of the interrupter in usual manner. No further explanation is here deemed necessary, it being understood that a spark may be supplied to cause explosion at the proper time.

The piston 24 is a hollow cylinder closed at one end and having expansion-rings 29 of usual construction lying in grooves in the piston. The pitman 3l is held to the piston by a conical" pin 32 passing through the hollow part of the piston and through a conical hole in the pitman. The ends of pins 32 are recessed, and one of the expansion-rings passes through the recesses in pin 32, thus holding the pin in place. on pin 32, having side bearings at 33 33 in the piston-head.

Cylinder 25 has the usual external radiation-ribs 35. The head 33, containing chamber 23, the cylinder 25, and fiy-wheel chainber 36 are connected together by rods 37 in usual manner.

At starting, the exhaust-valve 98 is opened, to permit air to escape from the cylinder. When the explosion takes place flame will then Hash from the Valve,to ward the gasolenetank.

The fly-wheel casing 36, directly under the cylinder, is a short hollow cylindrical casing with its axis transverse to the axis of the cylinder 25. MThe casing 36 is made in two parts.

-Instead of the usual transverse shaft the iiywheel casing has two short inwardly-projectingsleeves 4l, of hardened steel orotherhard material, removably attached to the casing. Each sleeve has a iiange 42 set snugly in a recess in the outside of the casing. These sleeves 41 form journals for the fly-wheel. They enter annular grooves around the central bosses 43 46 of the fly-wheel sections 44 and 45, which sections are, in general form, two fiat disks with projecting bosses, as will be explained;

The fly-wheel sections 44 and 45 are alike, except that the one, 45, has an elongated boss or shaft 46, and this projects from the side of the casing and bears the driving-pinion 48, which is firmly attached thereto.

Two inwardly-projecting pins 49 from the fly-wheel sections make contact at the center between the sections. A sleeve 50 covers these pins, and the pitman 31 surrounds this sleeve. The ily-wheel sections are assembled The pitman swingsfrom opposite sides, and a bolt 51 secures the wheel-sections together. 4l both have external and internal bearings in the ily-wheel sections the connections are most substantial, the wearing-surfaces, are large, and the device is very strong and compact. By giving to sleeve 4l both internal and external bearing-faces on the iiy-wheel I am enabled to reduce the length of what is used as a substitute for `the usual fly-wheel shaft, a very important consideration in engines for bicycles or small vehicles.

The driving-pinion 4S engages with the large red notion-gear 53,\vhich is connected to shaft 54 and lies flat against the casing, so as to be easily covered. Thus the speed of pinion 48 is much reduced to shaft 54, said shaft 54` being the shaft from which the driving-wheel of the bicycle receives its power, and may be a pedal-shaft, as shown, or may drive the vehicle independently. Pinion 4S also engages intermediate pinion 55, which overlaps driving-pinion The intermediate 55 drives pinion 56, which is attached to a cam-shaft v57, the latter extending transversely across the engine near the base of cylinder 25.

Cam-shaft 57 bears cam 59, and the gearing is so arranged that the cani 59 lifts tappet 60 with each rotation ofthe shaft 57, which occurs at every second rotation of the iiy- Wheel, and of course at each second upstroke of the engine.

The closed casing 36 can be filled with lubricant through a stoppered opening, and the fly-wheel and pitman will work in the casing. Enough of the lubricant will be carried up into the cylinder 25 to keep the same well lubricated. A stoppered opening 62 in casing 36 serves for the introduction of oil, and a relief or pop valve 99 permits air escape while retaining the lubricant. The casing 36 supports the bearing 6l of shaft 57.

Tappet 60 is pressed down by spring 63 and lifted by cam 50, as has been stated. Tappet 60 has a rod 64, which bears against finger 65, which finger strikes the spindle 66 of Valve 22 when the tappet rises, thus lifting said valve. The valve is pressed down to closed position by spring 67 whenever the tappet permits the valve closure.

The gear 53 is covered at its rear side by a casing` 70, connected to or integral with casing 36, thus attaching the engine strongly to the frame or to the pedalbracket of the frame. The face of gear 53 is covered by a plate 7 2, attached by screws or otherwise. The gears 48 55 56 are inclosed in a recess in one of the sections of casing 36. The outside of these gears is covered by a plate 73, which may be attached permanently to plate 72. Access can then be had to gears 48 55 56 by releasing the detaining-screws and turning plate 72 to one side around the pedal-shaft or the hanger g, which passes through said plate 72 at the center thereof. When the covers are closed, the gears are protected against the admission of dust or foreign substances.

Then as the sleeves IOO IIC

to the bars fof the frame and is held abovey the rear wheel by suitable supports fromI the frame.

My machine is composed almost entirely of.

metal. The frame or casing 36 is preferably aluminium, and all parts are constructed with a view to lightness.

I have described my mechanism with special referenceto its adaptation for use as a` motor for bicycles; but I do not desire to re-.

strict my claims on such parts as are capable 'of generalapplication, as is believed 'to be thecase in some instances. v

The explosion-'chamber 23 is inside the head of the engine in a single casting, which is bolted to the cylinder. The inlet check-valve and the-exhaust-valve are located in a projection of the engine-head, and the same projection or overhang permits the application of the sparking device 30 at theend of the explosion-chamber.

The valve-moving mechanism is below the overhang, and the exhaust-valve has its axis parallel with the axis of the cylinder. The ily-wheel casing is extended to form a support for the cam-shaft bearings under the overhang of the engine-head.V The engine and connections are thus of practically no greater thickness than the diameter of the piston-cylinder and radiating ribs. VAs a thin engine is important for bicycles,'this reduction of thickness ot' the engine is deemed important.

The engine is supported on post CZ by a bracket 9l,which has two perforated horns 92 to receive two of the rods 97, and has a clamp 93,which surrounds the seat-post and is clamped by screw-bolts 94.

What I claim is- 1. In a gasolene-engine as described, the combination of the engine-cylinder, the perforated, hollow piston moving in said cylinder, and having external grooves, the perfo'- rated pitman extending into said hollow piston and connected to the crank, a pin passing through the said piston and through the hole in the piston-rod, said pin having grooves in its outer ends, and a packing-ring lying in the grooves in the ends of the said pin and a groove in the pitman, and retained in said groove in the piston by the bearing of the cylinder thereon, substantially as described.

2. The combination, in an engine of the character described, of the engine-cylinder,

the grooved hollow piston therein having a transverse passage; the pitman-rod entering d ,said piston-head and a conical pin with the-fly-Wheel composed of two disks having Vinward projections and asurroundin g sleeve,

around which sleeve the pitman extends, all substantially as described. y Y

3. vIn a gasolene-engine as described, and

adapted for use with a motor-bicycle, the combination with the cylinder, of -theiiy-wheel casing directly under the cylinder, and consisting of two parts `forming a drum with its axis transverse to the cylinder, said f casing or drum having removable inwardly-projectingfsleeves formingjournals for the fly-wheel, the `sectional ily-'wheel journaled on said sleeves, and thepiston having its pitman connected to pins en the ily-wheel sections, substantially as described.

4. T-he combination with the cylinder, of; the iiy-wheel casingin form of a drum directly under the cylinder, the ily-wheel and its driv- Y ingconnections within the casing, the driving-pinion in a housing outside the casing, a

large reduction-gear lying flat against the.

casing and engaging said driving-pinion, and` a gear on the pedal-shaft with which saidreduction-,gear engages. -f

5. AIn a gasolene-engine, the cylinder, piston, and a pitman connected to the piston, a fly-wheel consisting of two journaled disks with projecting pins, a .sleeve surrounding such pins, and the pitman surrounding suchsleeve, substantially as described.

6. In a gasolene-engine, the cylinder, pis-` ton, and a pitman connected to the piston, a

VI OO ily-wheel consisting of two .disks with pro- `jecting pins which are inclosedby the pitman, a tie-bolt extending through the two sections and pins of the fly-wheel and unitingthem within the pitman, and journal-bearings for said liy-wheel, substantially as described.

7. In combination with the, inclosing casl ing 36, the flanged sleeves 41 with their flanges secured in said casing, and the fly-wheel having annular grooves into which grooves said ion and-connected to the valve-controlling cam-shaft, all combined substantially as de-` scribed.

9. In a gasolene-engine, the combination with the two retainin g-rods 37,0f a two-horned IIO bracket through which said rods pass, and a clamp at the side of said bracket, said clamp composed of separable pieces adaptedto embrace a cylinder or tube, substantially as described. f y

In testimony whereof I affix my signature in presence of two witnesses.

RGBERT M. KEATING.

l/Vitnesses:

W. A. BARTLETT, HARVEY T. WINFIELD. 

